Thermally-controlled valve.



W. H. PAINE.

THERMALLY CONTROLLED VALVE.

APPLICATION HLED MAY 2. I914.

Patented July 20, 1915.

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Specification of Letters Patent.

Patented uly 20, 1915.

Application filed May 2, 1914. Serial No. 836,007.

To all whom it ma concern:

Be it known that I, VVILLIA'M HOWARD PAINE, citizen of the United States, and resident of the city'of Providence, in the county of Providence and State of Rhode Island, have invented certain new and useful Improvements in Thermally-Controlled Valves, of which the following is a specification.

This invention relates to a thermal con trol of fluid supply for carbureter, and has for its object to provide an attachment for a carbureter comprising a thermal element connected to the carbureter and operative mechanism controlled by said element whereby an excessive heat about the carbureter ruptures said element and causes thefloat controlled valve to close and automatically shut off the supply of inflammable fluid. a

With these and other objects in View, the invention consists of certain novel features of construction, as will be more fully described and particularly pointed out in the appended claims.

In the accompanying drawings, the figure illustrates the carbureter partly in section with my improved thermally controlled shut-off mechanism attached thereto.

Referring to the drawing, 10 the carbureter, the bowl of Which, in the accompanying drawing, is shown partially in section, and a float 11, preferably of cork is located within the bowl and supported on the arm 12, which is pivoted at the point 13. To the opposite end of the arm is connected a valve 14 adapted to close the inlet opening 15 through which opening the supply of gasolene passes, being led thereto from a supply tank not shown, through the pipe 16.

A feature of my present invention is the provision of a thermally controlled mechanism attached to and mounted upon the carbureter itself for the purpose of positively closing this supply control valve, said mechanism comprising a body portion 17 having a hollow center 18, the same being provided with an extension threaded into the opening usually closed by a cap not shown in the carbureter casing directly above the fluid shut-off valve 14. In this 7 hollow center portion is mounted a plunger 19 having a stem 20 extending up through a corresponding hole 21 in the upper end designates of said body portion and a spring 22 is coiled about said stem, one. end of which rests on the plunger, and the other end against the upper wall of the center chambered portion. An inverted U shaped frame 23 is supported on the upper end of the body portion and the frame in turn supports the upper end 25 of the thermal link 24, the lower end of the link being connected bya hook26 or other means, to the upper end of the stem 20, whereby the plunger is retained in its upper or inoperative position against the tension of spring 22. This link is constructed in two sections joined together by solder 27 which is adapted to melt at some fixed normal.

It will be noted that the thermally controlled mechanism is connected to the carburetor at a point above the normal level of the fluid, therefore, there is no necessity of employing a packing, diaphragm or other means of keeping the moving parts either, gas or liquid-tight, and therefore, the moving parts may be constructed to work freely in their bearings so that there Will be no possibility of corrosion affecting their action thereby greatly simplifying the construcdegree of temperature above ternal combustion engines that fire often occurs by what is known as the back firing of the engine through the carbureter, which back fire often ignites'the gasoleneand oil about the carbureter setting the whole on fire, and if the flow of gasolene continues uninterrupted the fire is fed, and great dam-' age often results. But my improved apparatus may be attached directly to the carbureter itself, whereby the ordinary heat controlled valvemay be operated upon and 7 closed automatically as soon as the fire starts and held in closed position to positively shut olf and prevent further flow of gasolene.

I have shown my improved thermally controlled mechanism as attached to a certain style of carburetor but the same may be connected to a carbureter of any ordinary or commercial float controlled type by simply removing the small cap and screw this device into the carburetor in place thereof.

Copies of this patent may be The device is extremely simple in construction and practical and effective in its operation, and by its application to the carbureter, itself, instead of to a valve located in the supply pipe, it is located at the point of greatest danger, and therefore is in position to perform the most effective service.

I claim;

1. The combination with a carburetor having a float chamber, a float mounted in said chamber, and an inflowing fluid shut off valve controlled by said float, of an independentthermally controlled valve closing mechanism mounted on the carburetor, the same comprising a thermal element and means whereby the rupture of said element causes said valve to close and automatically shut off the supply of inflammable fluid.

2. The combination with a carbureter having a float chamber a float pivotally mounted in said chamber, and an inflowing fluid shut off valve controlled by said float, of an independent thermal valve closing mechanism mounted on the carburetor and located above the normal fluid level, said obtained for five cents each, by addressing the mechanism comprising a thermal element and means whereby the rupture of said element causes said valve to close and automatically shut ofl the supply of inflammable fluid.

3. The combination With a carburetor having a float chamber, a float pivotally mounted in said chamber, and an inflowing fluid shut off valve controlled by said float, of an independent thermal valve closing mechanism mounted on the carbureter the same comprising a plunger, a thermal elementretaining said plunger in a normally inactive position against a spring pressure whereby an excessive heat ruptures said element and permits the plunger to engage and close said valve and shut off the flow of liquid to the carburetor.

In testimony whereof I aflix my signature in presence of two witnesses.

lVILLIAM HOWARD PAINE.

Witnesses:

L. E. BROWN, WILLIAM E. HARTWELL.

Commissioner of Patents,

Washington, D. C. 

